export type OwnDataProperty = {
    readonly found: true;
    readonly value: unknown;
} | {
    readonly found: false;
};
export declare function hasControlCharacter(value: string): boolean;
/**
 * Read data at a trust boundary without invoking getters or inherited state.
 */
export declare function readOwnDataProperty(value: unknown, key: PropertyKey): OwnDataProperty;
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